What is "Rms"? What other differences are worth noting for the model years?

I shopped for a pre-owned Cayman S for a while before picking up the M3. Loved the Cayman but just couldn't find "the one". Too bad the Cayman R are going for insane prices. That would be the ultimate Cayman.

RMS = rear main seal. Costly job to replace, even more so to repair if it all goes bad.

If buying Porsche from between the years the 996 to early 997 (Boxsters and Caymans included), I'm going to stick to Mezger engines aka the ones in 911 Turbos, GT2/3 ect...

Thanks! What he said.

I had a 997.1 base with an rms issue. Less than 5k mi on the car so it was covered.